自由层阻尼环肋柱壳在流场中的稳态响应

STEADY STATE RESPONSE ANALYSIS OF SUBMERGED RING-STIFFENED CYLINDRICAL SHELLS WITH A UNCONSTRAINED VISCOELASTIC LAYER

本文采用Flugge壳体理论，讨论了敷设粘弹性自由层阻尼材料的环肋往壳在流场中受到径向周期性激励时的稳态响应。用复模量形式计及基壳和粘弹性阻尼材料的损耗因子以及流固耦合作用。讨论了粘弹性阻尼材料的物理参数、厚度、敷设方式和水深对环肋柱壳稳态响应的影响，得出了一些有实用价值的结论，对潜艇结构减振降噪有一定的参考价值。

The work is aimed to present mathematical analysis and numerical rasults on steady state response of water-immersed ring-stiffened cylindrical shlles coated with unconstrained layer of viscoelastic material to a radical harmonic force. Flugge's shell equations are employed. The solution is obtained by Hessenberg-transform and iterative method.The damping properties of ring-stiffened cylindrical shell, the thickness of the damping layer, submerged depth, etc, are discussed. Some conclusions are drawn from numerical computation, which may be valuable to the application of damping material on noise and vibration control of submarines.